Class: Buho::Watcher

Inherits:
Object
  • Object
show all
Defined in:
lib/buho.rb

Overview

Watcher class

Instance Method Summary collapse

Instance Method Details

#compile(path) ⇒ Object

Compile HAML



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# File 'lib/buho.rb', line 126

def compile(path)
  begin
    # Read HAML and compile it
    haml = File.open(path).read
    @compiled = Haml::Engine.new(haml).render
  rescue Haml::Error => e
    #Error compiling message
    puts ">> Error: \"#{e.message}\" at line #{e.line}"
  end
end

#opts ⇒ Object

Configure CLI options



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# File 'lib/buho.rb', line 78

def opts

  # Handle CLI options
  OptionParser.new do |opts|

    # Set separator
    opts.separator nil

    # Option to set input directory or raise a exception if not exists
    opts.on('-i', '--input [dir]', String, 'Set input directory.', 'If omit this option, input path has been used instead') do |i|
      begin
        @input = File.join('.', i)
        raise IOError unless File.exists? @input
      rescue IOError
        puts ">> Error: Input directory not found\n\n"
        exit
      end
    end

    # Option to set output directory or raise a exception if not exists
    opts.on('-o', '--output [dir]', String, 'Set output directory.') do |o|
      @output = File.join('.', o)
    end

    # Show help info
    opts.on('-h', '--help', 'Show help info.') do
      puts opts;
      exit
    end

    # Parse!
    opts.parse!
  end

  begin
    raise OptionParser::MissingArgument if @input == nil
  rescue OptionParser::MissingArgument
    puts ">> Error: Missing argument --input\n\n"
    exit
  end

  # If output dir has not been defined, use input dir instead
  @output ||= @input
end

#watch ⇒ Object

Watch changes, compile and save it



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# File 'lib/buho.rb', line 23

def watch

  # Input dir
  @input  = nil

  # Output dir
  @output = nil

  # Compiled HTML
  @compiled = nil

  # Gem name
  puts "\n","-" * 41
  puts " Buho #{Buho::VERSION}"
  puts " Copyright (c) 2013 Diego Saint Esteben"
  puts "-" * 41, "\n"

  # Options
  self.opts

  # Print input/output paths
  puts "Input dir: #{@input}"
  puts "Output dir: #{@output}"

  # Ready to watch..
  puts "\nReady to watch...\n\n"

  # Listen
  Listen.to(@input, :filter => /\.haml$/, :relative_paths => true) do |modified, added, removed|

    # Walk into modified files
    modified.each do |path|

      # Paths
      input  = File.join(@input, path)
      output = File.join(@output, path).gsub!('.haml', '.html')

      # Watching message
      puts ">> Watching #{input}"

      # Compile HAML file and save in @compiled
      self.compile input

      # Write HTML into output path
      self.write output

      # Compilation successfully
      puts ">> Compiling #{input} into #{output}"
    end
  end
end

#write(path) ⇒ Object

Write compiled HTML into HTML file



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# File 'lib/buho.rb', line 140

def write(path)

  # Create directory tree
  dirname = File.dirname(path)
  FileUtils.mkdir_p(dirname)

  # Save compiled HTML into file
  File.open(path, 'w') do |f|
    f << @compiled
  end
end